The Research Of Four Properties And Distribution Of Oil-water In Zhenjin Area

In the Ordos Basin,the exploration of Upper Triassic chang9extend thebreakthrough in2005.in recent years,the oil flow was found in chang9constantly.Insome areas there have been a high industrial oil,but in various regions the distributionof the Chang9is dispersed,Stratum of the most wells are water layer,water distributionis more complex,Zhenjing exploration area also have this problem.“Four properties” inthe study area,the oil-water identification,distribution and production mechanism ofwater are researched.In order to determine the reservoir of the lower limit,comparison of differentlayer’s oil layer,oil-water layer,the oily water layer,water layer and the dry layer)”Fourproperties” were studyed detailly.Explain the physical parameters of the studyarea,explained on the basis of the reservoir lower limit of the reservoirthickness,porosity and permeability,reservoir effective thickness is0-22m,generallydistributed in the8-16m,in the Honghe55wells District,the most developed area isHonghe55-6-Honghe55-3and in the Honghe42wells District is Honghe53-theHonghe42,along the main distributary channel show cloth,distribution ofporosity,permeability and effective thickness of sand is consistent.Applied to a variety of methods to identify the oil-water layer,achieved goodresults.①Establish identify the oil-water plates of the study area,good results wereAchieved.②The Mahalanobis distance identification method identify the correctoil-water layer of88.2%.(3)Fisher discriminant to identify ways to identify the correctoil-water layer is also88.2%.Integrated use of three old wells of the study area werereviewed to identify the oil-water layer of oily water layer is7.9m to141.9m,there is noreservoirs,most of the dry layer and water layer,which is the early exploration of oil andgas show good consistent. Oil-water layer of the study area is mainly distributed in chang912of chang91,thewater distribution is mainly controlled by lithology,reservoir type of lithology andstructure-lithologic traps oil and gas reservoirs,wells wells are producing water,thegeneral parts oil more than water,and low parts of water and more oil,the oil gathered inthe high slope parts.Formation water, there are two types,one produced in the lens bodyof water of the river edge was called lens water,poor physical properties,producing lesswater,content of chloride ion is low and a small amount of water,does not affect theexploration;another is edge and bottom water,water production than large,highchloride ion content,exploration should be avoided.Mercury pressure,relative permeability data calculated oil-water transition zonethickness of91segments of different types of reservoirs in the Chang showed that theoil and gas transition zone thickness is much larger than the closed height oftraps.Honghe42-Honghe55well area as a whole is in the oil-water transition zone andin the lower of it.this is the reason of wells producing water,and water is more than oilin this study area。...